Author Topic: Mystery Black/White stone  (Read 833 times)

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Talusman

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Mystery Black/White stone
« on: December 22, 2015, 03:23:03 PM »
Got this in a mixed box that contained some Oregon material like rim Jasper, hay creek, and limb cast.

It's a small piece, and when cut it shows a black/white pattern. Looks similar to pictures of "fireworks jasper" online.

Thoughts?

Thanks!

-Jeremy

jakesrocks

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Re: Mystery Black/White stone
« Reply #1 on: December 22, 2015, 04:18:37 PM »
Isn't that the one they call Chinese script stone or Chinese writing stone or some such ?
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Ranger_Dave

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Re: Mystery Black/White stone
« Reply #2 on: December 22, 2015, 04:26:38 PM »
Howlite? Magnesite? Try soaking it in some food coloring if you don't like the white.

Talusman

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Re: Mystery Black/White stone
« Reply #3 on: December 22, 2015, 05:04:24 PM »
Thanks for the responses.

Porphory (Chinese writing stone) has white crystals in black matrix - this is more like black moss/webs in white jasper.

Also, this stuff is hard like jasper (~6 Mohs). I'd expect Magnesite and Howlite to be much softer.

I'll keep lookin!

-Jeremy

Ranger_Dave

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Re: Mystery Black/White stone
« Reply #4 on: December 22, 2015, 05:21:06 PM »
Magnesite and Howlite are pretty soft, about 3.5.

Deb

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Re: Mystery Black/White stone
« Reply #5 on: December 22, 2015, 07:19:01 PM »
This sorta looks like dendritic opalite from Australia....

Deb :)

lithicbeads

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Re: Mystery Black/White stone
« Reply #6 on: December 22, 2015, 07:35:52 PM »
That sounds like a good guess. there are thousands of types of agate and jasper in Oregon but only a few dozen are in amounts that can be marketed  or are on public property. I have found one offs along road sides and even with a boat  on theshoreline  so it could be from Oregon as well.

wyrock

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Re: Mystery Black/White stone
« Reply #7 on: December 22, 2015, 10:11:51 PM »
I would have to do some digging but it seems to me like orthoclase (sp) is black and white but my memory, ......... well you know. At least some of you know anyway and my book is in a really difficult place to get to.
Jim

Just did a search and here is a link to black orthoclase and it is with white ????? Maybe they both are.

https://www.bing.com/images/search?q=Black+Orthoclase&FORM=IRTRRL
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